Chemicals Effects Of Second Hand Vape Smoke Thirdhand Smoke Resource Center Effects Of Second Hand Vape Smoke Secondhand smoke and secondhand aerosol The risks of vape pens' secondhand aerosols When someone vapes around others they expose them to 'second hand aerosol'. But what happens to that aerosol then? Does it disappear or is it like cigarette smoke and stays around, sticking to Juul study shows secondhand vaping emissions are less toxic than cigarette smoke